Nuclear Fussion
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The document discusses density and nuclear fusion. It provides densities for various celestial objects like stars and planets. Density is defined as mass divided by volume and is important for nuclear fusion to occur inside stars. Nuclear fusion is the process where two light atomic nuclei fuse to form a heavier nucleus and release energy. Deuterium and tritium are isotopes that can undergo fusion to form helium.
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Water resources engineering
Hydrology means science of water.
It is the science that deals with the occurance, circulation and distribution of water on the earth.
Hydrology is a broad subject of an inter-disciplinary nature drawing support from allied sciences.
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Underground construction Techniques civil final year seminar
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Pressure is a type of force measured as the force applied over an area. It can be high, like the pressure from stilettos, or low, like the pressure from dice. Pressure is calculated using the formula of force divided by area. Moments are also a type of force but are not symbolized on the periodic table like pressure. Levers can be used to increase or decrease the magnitude of a force and change the direction of its application through its fulcrum.
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Fossil fuels like coal, oil and gas take several years to form naturally, whereas solar and wind power are renewable energy sources with some disadvantages. Solar power has advantages of being sustainable and environmentally-friendly but is extremely expensive, while wind power is cheap but produces intermittent energy depending on weather conditions. Solar power installations can be costly.
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